Physical Review Letters

Physicists investigate onset of effective mass

( —Although mass may seem to be a fairly straightforward concept, from a physics perspective it can be much more complex than weighing an object and reading off a number in grams. For instance, an object's mass ...

May 21, 2014 feature
4.8 / 5 (36) 9

How did evolution optimize circadian clocks?

( —From cyanobacteria to humans, many terrestrial species have acquired circadian rhythms that adapt to sunlight in order to increase survival rates. Studies have shown that the circadian clocks ...

Sep 12, 2014 feature
3.4 / 5 (28) 17